Microscope



Jan. 27, 1925.

E. G. CAMPBELL MICROSCOPE Filed Oct. 20. 1922 A m \m 1 NM III N m k \A AI.

gwuentof; Elmer G. Camfibelz Patented Jan. 27, 1925..

UNITED TES PTENT OFFICE.

MICROSCDPE.

Application filed October- 20, 1922.

To all whom it may concern:

Be it known that I, ELMER G. CAMPBELL, a citizen of'the United States, residing at West Lafayette, in the county of Tippecanoe and State of Indiana, have invented new and useful Improvements in Microscopes, of which the following is a specification.

This invention relates to microscopes, and its object is to provide a simple and efiicient instrument of this kind designed for examining small objects and for general nature study, including taxonomic study of insects and plants, and also to provide an instrument of this kind which shall be small and compact in form so that it may be conveniently carried in the students pocket.

Other objects and advantages of the in vention will be pointed out in the detailed description appearing hereinafter.

In order that the invention may be better understood, reference is had to the accompanying drawing, wherein- Figure 1 is an elevation of the instrument partly in section;

Fig. 2 is a similar View showing the instrument folded and closed up;

Fig. 3 is a plan view of certain parts shownin Fig. 1;

Fig. 4: is a rear end view of the instrument and Fig. 5 is a horizontal section on the line 5-5 of Fig. 1.

Referring specifically to the drawing, the instrument consists of a handle, and a lens or magnifying glass, as well as an object or specimen holder carried thereby. The handle is composed of two tubular sections 8 and 9 respectively, which are separably connected, the section 9 being insertable, into one end of the section 8. The other end of the section 8 carries a support for the lens and the object holder. This support is a short piece of tubing 10 closed at one end by a plug 11 and at the other end by a cap 12. The tubing 10 is insertable into the tubular handle section 8. The ends of the handle section 8 are shouldered internally, as shown in Figures 1 and 2, to limit the extent of insertion of the parts 9 and 10.

The plug 11 is apertured to receive at a Serial No. 595,835.

tight fit the reduced inner end 13 of a base member 1 1 which projects outwardly from the plug and has a pair of laterally spaced ears 15 through which passes transversely a pivot screw 16. Between the ears 15 seats a lug 17 extending laterally from a block 18. The screw 16 passes through the lug 17, and hence the block 18 is pivotally supported.

The lens or magnifying glass 10 is carried by a frame 20 which is pivoted, as shown at 21, to one end of a link 22 having its other end pivoted, as shown at 23, to the block 18.

The object holder is a tweezers-like member 24: carried by a support in the form of a rod 25 which is slidably supported by the base member 1 1, the same having a longitudinal aperture to seat the rod, and the rear end of the latter extending into the tube 10 and having here a lateral bend 26 to limit the extent of withdrawal of the rod.

The support 25 for the object holder 24 is slidable in order that the latter may be correctly positioned with respect to the lens 19. The support is also rotatable to bring all sides of the object into view. In order to facilitate manipulation of the support, the same has a knurled finger piece 27.

The pivoted mounting of the block 18 is to obtain a proper focus of the lens 19, said block being tiltable for this purpose to bring the lens closer to or farther away from the object to be viewed. To facilitate manipulation of the block 18, it has a serrated ridge 28 adjacent to one side. The pivot joint of the block 18 works tight so that the block remains in adjusted position.

The link connection 22 between the block 18 and the lens-supporting frame 20 materially increases the range of adjustment of the lens, it being understood that the pivot joints 21 and 23 also work tight to maintain the adjusted position of the lens-supporting frame.

Figure 1 shows the instrument ready fol" use. It will be held in the left hand and adjusted by the thumb and forefinger, leaving the right hand free for picking the object and recording the facts observed. The dissecting and other tools (shown at 29 in Figure 2) are mounted in the tubular handle section 9. One end of this section is closed by 'a cap 30, and to its other end is fitted a plug 31 having apertures 32 through which the tools 29 are removable. Vhen the instrument is to be used, the handlesection't) willjbe fitted to the rear end of the handle section 8 in such a manner as to leave the apertured end plug 31 exposed for removal oftlietools" 29'. W'hen the instrument is not in use, the handle section 9 will be reversed so as to locate'the plug 31 inside the handle section 8 and thus guard against loss ofthe tool's'. The tube lO will also be reversed so as to position the lensftheobjectholder, andall the parts associated:therewith inside the handle section 8,]whereby said parts are effectually guarded against damage. The device now presents the'appear'ance of a simple tube which iscompact andcan be convenientlycarried in the stiidents pocket.

By theme of the hereinbefore described instrument a quick, generalobservation of an object is made very easy, and if a detailedexamination 1s des1red,the ob]ect may be held firmly in' focus while it is being;

needled or revolved for views from all angles. The dissecting and other tools are readily accessible, and when the" examination is: completed, the instrumentmay-be closed and placedin the pocket;

I claim, I

1. The combination of a magnifying glass and its frame, a handle, a base member carried by-the handle, a block pivotally supported by the base member, a link connection between the block and the magnifying glass frame, said block serving as a finger p ece for actuating said magnifying glass and frame, to proper position, and an objectholder carried by the base member.

2. The combination of a magnifying. glass 7 andfits frame, af'handle', a base member carried by, the handle, a block pivotallysupported by the" base member transverse thereof, a link; connection between the block antl'the magnifying glass frame, said block constituting an actuating lever for said frame, and an object holdercarriedbythe base member, said holder being, adjustable V relativelito the I glass."

I 3, The ,co fbinati o'n'of a magnifying glass and its framefa 'ha'ndle, a base member car ried' by; the handle, a block pivotally supported by the base 'member "transversely thereof, allinlr'fconne ction between the block and tlie mag'nifyingglass frame, said'block serving asafinger piece for actuating'said magnifyingglassand frame toiproper posit1on,a ]rod'"loosely supported by the base inelmbeijand'an object holder carried bythe r0 'r i A; The combination of a magnifying glass and its'frame',fahandle, a bas'e member cari'ie d by the handle, a block pivotally supported by the base member, a link connection between the block and the magnifying glass frame, an object holder, and a slidable and rotatable support for said holder carried by the base member. s

5. The combination of a magnifying *glass and its frame, a handle'concentric'thcre with and at one end thereof, a base member carried by the handle, pivoted supporting means for the aforesaid frame carried by the base member, a thumb operated controlling lever therefor, and an object holder carried by the base member.

6. The combination of magnifying lass and its frame, a handle concentrict erewith and at one endthereof, a base member carried by the handle, pivoted supporting means. for the'aforesaid frame carried by the base member, a thumb operated controlling lever therefor, and an objectholder carried by the base member, saidholder being adjustable relative to the lass.

7. The combination ofa magni yingglliss' and'its frame, a handle,'abase member carried by the handle, pivoted supporting means: for the aforesaid frame carried by the base member, a rod loosely sup orted by the base member, and an object liolder carried by the rod.

8. The combination of a magnifying glass and its frame, a handle, a base membercan ried by the handle, pivoted supporting meansv for the aforesaid frame carried by the base member, an object holder, and a slidable and rotatable support for said holdercarried by the base member,

9. The combination of a hollow handle, a magnifying glass and its frame, and supporting means for said frame detachably and reversibly fitted to v one end of the handle for insertion of the glass and its frame thereinto.

10. The combination of a hollow handle, a magnifying glass and its frame, an object holder, andsupporting means for said frame and holder 'detachably and reversibly fitted to one end of the handlefor in'sertionjof the glass, its frame andthe ob'ject holder thereinto. e

11' The, combination of a hollow handle, a magnifying glass and its frame, su' porting means for said frame detachably and reversibly, fitted to one end of the handle for insertion of'the' glass and its frame thereinto, and a tool holder removably fitted "to the other end of thejlhandle.

12. Thefcombination ofa hollow handle, a magnifying glass and its frame. an-object holder, supporting means for said frame'an'd holder detachably and reversibly fitted to one endof the handle for insertioii of theglass, its frame and the object holder thereinto, and a tool holder removablyfitted to the other end ofthehandle.

13. The combination of a. magnifying glass and its frame, a handle, a base member earmember, and said object holder having conried by said handle, a block pivotally suptrolling means adjacent said block whereby ported by the base member, a controlling both the magnifying glass frame and object 10 connection between said block and the holder may be conveniently manipulated by 5 magnifying glass frame, said block constitutthe fingers of one hand.

ing a controlling lever for said frame, an In testimony whereof I afiix my signature. adjustable object holder carried by said base ELMER GRANT CAMPBELL. 

